Results 61 to 70 of about 135,378 (342)

Particle saltation trajectories in supercritical open channel flows: Roughness effect

open access: yesEarth Surface Processes and Landforms, Volume 47, Issue 15, Page 3588-3610, December 2022., 2022
This study investigates single particle trajectories in supercritical open channel flows under different hydraulic and roughness conditions. Therefore, it helps to get a better understanding on the mechanics and prediction of bedrock incision and hydro‐abrasion occurring in steep bedrock rivers and hydraulic structures.
Dila Demiral   +3 more
wiley   +1 more source

Lensing in the Blue. II. Estimating the Sensitivity of Stratospheric Balloons to Weak Gravitational Lensing

open access: yesThe Astronomical Journal, 2023
The Superpressure Balloon-borne Imaging Telescope ( SuperBIT ) is a diffraction-limited, wide-field, 0.5 m, near-infrared to near-ultraviolet observatory designed to exploit the stratosphere’s space-like conditions.
Jacqueline E. McCleary   +25 more
doaj   +1 more source

Gravitational Lenses [PDF]

open access: yesSymposium - International Astronomical Union, 1993
In approximately half the systems currently recognized as strongly gravitationally lensed, the background object is an extragalactic radio source. Radio observations have played an important role in the identification of lensed systems, and the properties of radio sources allow some of the astrophysical applications of lensing to be realized.
openaire   +2 more sources

Gear Up for the Action Replay: Leveraging Lensing for Enhanced Gravitational-wave Early Warning

open access: yesThe Astrophysical Journal Letters, 2023
Premerger gravitational-wave (GW) sky localization of binary neutron star (BNS) and neutron star–black hole (NSBH) coalescence events would enable telescopes to capture precursors and electromagnetic (EM) emissions around the time of the merger.
Sourabh Magare   +5 more
doaj   +1 more source

Lensing of 21-cm Fluctuations by Primordial Gravitational Waves [PDF]

open access: yes, 2012
Weak-gravitational-lensing distortions to the intensity pattern of 21-cm radiation from the dark ages can be decomposed geometrically into curl and curl-free components.
Book, Laura   +2 more
core   +1 more source

Polyacrylic Acid Copolymers as Adhesion‐Adapted Model Materials for Cleaning Tests

open access: yesMacromolecular Chemistry and Physics, Volume 224, Issue 1, January 2023., 2023
Acrylic acid (AA) copolymers adhere physically to metallic surfaces and are used for production of layers which shall mimic real filmic contamination layers for cleaning tests. To further adjust the polymers to the reference contaminations the polarity of the copolymers is varied not only by the percentage of carboxy groups but also by additional ...
Susanne Höhne   +6 more
wiley   +1 more source

Gravitational lensing of gravitational waves: wave nature and prospects for detection [PDF]

open access: yes, 2019
We discuss the gravitational lensing of gravitational wave signals from coalescing binaries. We delineate the regime where wave effects are significant from the regime where geometric limit can be used. Further, we focus on the effect of micro-lensing and the combined effect of strong lensing and micro-lensing.
arxiv   +1 more source

Formation and growth of multiple, distinct ice lenses in frost heave

open access: yesInternational Journal for Numerical and Analytical Methods in Geomechanics, Volume 47, Issue 1, Page 82-105, January 2023., 2023
Abstract This paper presents a fully coupled thermo‐hydro‐mechanical (THM) model which simulates frost heave in fully saturated soils. The model is able to simulate the formation and growth of multiple distinct ice lenses. The basic equations of the system were derived using the continuum theory of mixtures, nonequilibrium thermodynamics, and fracture ...
Hao Gao   +5 more
wiley   +1 more source

ВЛИЯНИЕ ГРАВИТАЦИОННОГО ЛИНЗИРОВАНИЯ НА ФУНКЦИЮ СВЕТИМОСТИ КВАЗАРОВ

open access: yesOdessa Astronomical Publications, 2011
The function of quasar distribution on apparent brightness is discussed. This function is found on base of suggestion that quasars, at least partly, are strong gravitational lensing images of the active nuclei of distant galaxies.
Ю. Л. Бухмастова
doaj   +1 more source

Roulette‐Inspired Physical Unclonable Functions: Stochastic yet Deterministic Multi‐Bit Patterning through the Solutal Marangoni Effect

open access: yesAdvanced Functional Materials, EarlyView.
Geometric multi‐bit patterning based on dynamic wetting and dewetting phenomena creates roulette‐like Physical Unclonable Function (PUF) labels with stochastic yet deterministic properties. This method leverages the solutal‐Marangoni effect for high randomness while achieving deterministic multinary patterns through polygonal confinement of binary ...
Yeongin Cho   +8 more
wiley   +1 more source

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